Telescopic curtain-pole.



Patnted 1an.' 22, 1901. vJ. o. CLARK. TELESGPIC CURTAIN POLE.

(Application led Sept. 1, 1899.)

(No Model.)

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Miren States PATnNr OFFICE.

JOSEPH O. CLARK, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE PHOENIX MANUFACTURING COMPANY, OF SOUTH BERWICK, MAINE.

TELESCOPIC CURTAIN-POLE.

SPECIFICATION forming part of Letters Patent N o. 666,467, dated January 22, 1901. Application filed September 1,1899. Serial No. 729,219. (No model.)

To all whom it may @OwW/J port is obtained for sash-curtains (and other Beit known that I, JOSEPH 0. CLARK, a citithings) and the supports are readily adj listed zen of the United States, residing at Boston, in place without any turning or rotative marin the county of Suffolk and State of Massaring movement of either head upon the win- 55 chusetts, have invented certain new and usedow-casings or other bearings between which ful Improvements in Telescopic Curtain-Fixthe support is mounted. tures, of which the following is a specification, A distinct and marked advantage of my new reference being had therein to the accompanysupport lies in the fact that an effective ading drawings. justment of the wedge is always possible, be 6o 1o Figure l is a view showing one of my new cause the wedge is always under the visible telescopic supports in place between windowcontrol of the operator and is easily inserted jambs, and in that position adapted to supin the mouth of the outer telescopic member portacurtain, for example. Fig. 2 is alengthby the fingers of the operator, the marginal wise central section of the telescopic holder. recesses or slits 6 permitting the thinner edge 65 Fig. 3 is a perspective of the annular wedge (which is made as thin as possible) of the anwhich locks the telescopic memberin adj usted nular wedge to enter the space between the position. opposed surfaces of the outer and inner tele- The object of my invention is to produce a scopic members, which are made a sliding fit telescopic holder for supporting window-curone for the other in order that the extended 7o 2o tains, portires, advertisements, articles of rod may not sag from the horizontal when it manufacture, garment hooks and supports, is in use. and anything else desired,the members of the It is important in practice that the teleholder being very nearly of the same diameter scopic members should be a sliding tit for the and adapted to be firmly locked in adjusted reason stated-that the thinner or entering 2 5 position. end of the rect-ilinearly-movable Wedge should In the drawings, l is the inner telescopic hug the inner telescopic member, as it is betmember, 2 the outer telescopic member or ter enabled to do bythe inward spring of the tube, and 3 is an annular wedge for locking marginal slots 6, and that the wedge be made or coupling the members in adjusted position. of the thinnest possible material in order not 8o 3o This annular wedge 3 is of an internal diamto be unsightly or present such a shoulder at eter equal throughout its length to the diamthe joint as will interfere with the free sliding eter of the inner member 1, has a sliding iit movement of slender curtain-rings, by which on the inner member l, and has its outer surlac-e or other delicate draperies are frequently face tapered downwardly from its outer or secured to the rods or upon which the hem- 35 butt end 4i to its inner end 5, being made of passage of such draperies, through which the very thin metal and preferably, but not neccurtain-rod is frequently passed to support essarily, formed on its inner end with a marthe draperies, can catch and be torn when the ginal recess 6, which secures a somewhat freer drapery is pulled aside or slid along the rod. entrance of the annular edge between the op- Vere it feasible to have the curtain-rods of 9o 4o posed walls of the telescopic members when fairly large diameter, the annular wedges they are adjusted by crowding the annulus might of course be made of thick material, thereinbetween, the annulus or wedge holdand perhaps the difficulty heretofore experiing the outer and inner telescopic members enced of contriving thin and delicate holding together by frictional contact. By my condevices for telescopic rods would be readily 45 struction,wherein the telescopic members are overcome; but under existing conditions, in adjusted by sliding them endwise without any which the curtain-rods must be of relatively turning or screwing motion and wherein the small diameter and my new fastener of the wedge is inserted between the outer and inthinnest practicable material, I have experiner telescopic members by a simple endwise enced much difficulty in devising a wedge roo 5o push and without any turning or screwing which can be manipulated by the ingers to movement, a very simple and ective suphold the rod-forming members together in adjusted position, for it will be observed that although inward compression on the ends of the rod tends to wedge the wedge more tightly in place in one sense, yet the Very same compression tends to make the inner surface of the annular wedge slip on the inner supporting member, the opposing surfaces of the inner member and wedge-annulns becoming smooth and polished and requiring under the circumstances, in order to wedge the parts together, so that they will not slip from adjusted position, a biting action at the thin edge ofthe wedge on the inner telescopic member. This biting action I find to be obtained in practice by those portions of the thin edge of the wedge which are between the recesses (i, which permit the intermediate portions of the thin edge to be each sprung hard and tight against the inner telescopic member when the outer telescopic member is crowded over the thinner edge of the annular wedge. It may be said that the recesses 6 form the thin end of the wedge-annulus with a plurality of wedges by separation of those parts of the end which are between the recesses. The wedge-annulus is free from projections both within and without.

The outer ends of the members l and 2 are provided with elastic heads 7, one of which isI adapted to be compressed when the members l and 2 are forced apart between opposed walls or framework, the retracting strain of the elastic head when the rod is located and released from the pressure of the hand exerting inward pressure on the telescopic members, whereby the mouth of .the member 2 is held in such intimate contact with the `tapering surface of the'annular wedge that said wedge is compressed and clamped onto the surface of the member l.

By placing the heads 7 between opposed walls or framework and crowding the members apart and then sliding the annular wedge between the members they are readily locked together in a very secure manner at the inner end of the outer telescopic member 2. By this construction an appearance of uniform diameter from end to end of the holder is oblrained, and the holder possesses the marked advantage of having the annular wedge in sight and in a position to be manipulated by the thumb and finger 'when'it is desired to lock the telescopic members in adjusted position.

What I claim isl. A telescopic fixture comprising an inner member, an annular wedge closely embracing said member and adapted to slide thereon, an outer tubular member closely embracing the inner member and having a mouth which is adapted to engage and compress the annular wedge to clamp the same on the inner member, and means carried by said iixtu re forexerting a constant endwise, elastic `pressure on one of said members whereby the mouth of the outer member is maintained in compressible relationto the wedge.

2. A telescopic fixture comprising aninner member having a head at its outer end, altubular wedge, having a compressible portion, closely embracing said member to slide thereon, and an outer tubular member closelyembracing the inner member, having atits inner end amouth adapted to receive and compress said wedgewhen forced thereon, and provided at its outer end with anelastic compressible head which is adapted to exert an inward strain on said outer member, to maintain the mouth thereof in compressible relation tothe annular wedge.

In testimony whereof I aix my signature in presence of two witnesses.

JOSEPH O. CLARK.

Witnesses:`

EDWARD S. BEACH, E. A. ALLEN. 

